I'm working on a configuration file format. I see a lot of complexity in the current space, and not enough thought put into the use-cases for a configuration language.

YAML is prone to typos, TOML does not seem obvious to me, and JSON is not as easy to edit.

I've been designing CLEO:https://code.nicktrevino.com/cleo/

The focus is on a configuration language that a single application would use. Not a system-level configuration that might need control flow, etc.

It is at a solid state right now, though it's not officially released yet as I slowly validate it with usage.